30 points

Name:_______________________________            Date:____________        Period:_________

Go to class web site:  www.dancingbearakitas.com/school

Select Physics.  Select Course of Study.  Select Simple Machines 

The numbers on the sheet correspond to the numbers of the web sites under web resources.

Select a new web site for each of the numbered sections of this worksheet.

1.     Read about Divinci's Simple machines.  Which one of our 6 is missing?

The missing simple machine is: ___________________________________________________

Define the following other elements of machines.  Write the definitions on a sheet of notebook paper and attach it.

Gears    Bevel Gears    Worm Gear    Rack & Pinion    Cam    Crank & Rod    Chains & Belts    Ratchet  

Now go to gadget anatomy and find these parts.

2.     Visit EdHead's.  Complete the table with your scores.

3.      Do the COSI applet.

Click on Mechanical Advantage.  

            What is an advantage of a pulley system?   _______________________________  

            What is a disadvantage of a pulley system?   _______________________________  

            What does every machine lose energy to? ____________________    

Click on each simple machine listed.  Write down how you determine the mechanical advantage of the device.

            1. Pulley.    ______________________________________________________________________

             ________________________________________________________________________________

2. Wedge.    ______________________________________________________________________

              ________________________________________________________________________________

3. Inclined Plane.__________________________________________________________________

              ________________________________________________________________________________

4. Wheel & Axle.__________________________________________________________________

              ________________________________________________________________________________

5. Lever. _________________________________________________________________________

              ________________________________________________________________________________

Click to read about the 3 lever systems.  Label each system with the proper class and write 3 examples below it.

F = Fulcrum    E=Effort    R=Resistance

Which lever system does not result in a mechanical advantage? ___________________

Take the simple machine quiz "Find the Simple Machines".    Write your score here: ____________

Click on "Putting Simple Machines to Work".

        What is the mechanical advantage of the wheelbarrow? __________

        What is the mechanical advantage of the ramp? __________        

        What is lever class of the hammer? __________

        How much effort is needed to lift the floor? __________

        Which screw will require the least amount of effort to use? __________

        How much work is saved by using the block and tackle?  __________

4.    Read how a bicycle works

        List the parts of a bicycle:   ___________________________________________________

        What are bearings used for?  __________________________________________________

        ___________________________________________________________________________

        List 5 places bearings are used: _______________________________________________

        What is the idea around multiple gears?__________________________________________

        ___________________________________________________________________________

        What device is used to change gears?  __________________________________________